Setra System Model 231 - Manual (Page 6)

6
3-Valve Manifold Description
Manifold Block Brass
Valves (3) V1 for connection to + port
V2 for connection to - port
V3 for equalizing pressure
Valve Type 90 degree On/Off
Process Connections 1/4-18NPT Internal Thread
Model 231
Differential
Pressure Transducer
Shunt Valve
V1
V2
V3
Shut Off Valves
High Process
Connection
1/8-NPT Low Process
Connection
1/8-NPT
3.0 OPTIONAL 3-VALVE MANIFOLD PROCEDURE
The 3-Valve Manifold Assembly is normally shipped with valves V1 and V2 closed
and V3 open.
To Place the 231 into service:
1. Confirm valves V1 and V2 are closed and valve V3 is open.
2. Mount the manifold and install process connections.
3. Slowly open V2, then V1.
4. Close the V3 valve.
To Take the 231 out of Service
1. Open V3 to equalize the pressure at the Model 231.
2. Close the V1 and V2 valves.
Figure 2